₨2,500⁰⁰

Advanced level chemistry physics science for technology /ordinary level mathematics science 2019,2020,2021 theory revision. Specially for those who missed their lessons. Heat , mechanics, electronics, electricity, waves, chemical calculations, light from very basics. 500 organic conversions will be solved by using 15 mind maps. Another 15 mind maps for inorganic spd industrial. Colombo,matara,negombo, kalutara, panadura, galle, gampaha. Roshan0711230900